Drive Technology \ Drive Automation \ System Integration \ Services
Addendum to the Operating Instructions
Industrial Gear Units
Direction of Rotation Reversal
With Installed Backstop and Freewheeling Clutch
Edition 10/2010
17032814 / EN
SEW-EURODRIVE—Driving the world
Contents
Contents
1
Important Information ......................................................................................... 4
2
Structure and Function....................................................................................... 5
3
4
5
6
2.1
Structure and function of backstops and freewheeling clutches ................. 5
2.2
Drives with external backstops ................................................................... 6
2.3
Drives with internal backstops .................................................................... 7
2.4
Drives with backstop, auxiliary drive and freewheeling clutch .................... 8
Position of the Backstops .................................................................................. 9
3.1
X.F.. ............................................................................................................ 9
3.2
X.K.. .......................................................................................................... 11
3.3
X.T.. .......................................................................................................... 13
Corresponding Directions of Rotation ............................................................ 15
4.1
X.F.. .......................................................................................................... 15
4.2
X.K... ........................................................................................................ 16
4.3
X.T... ........................................................................................................ 17
Changing the Direction of Rotation................................................................. 18
5.1
Notes on installation.................................................................................. 18
5.2
Tightening torques .................................................................................... 18
5.3
Drives with external backstops ................................................................. 19
5.4
Drives with internal backstops .................................................................. 20
5.5
Drives with freewheeling clutch................................................................. 22
Startup................................................................................................................ 24
6.1
Startup for drives with backstop ................................................................ 24
6.2
Startup for drives with backstop, auxiliary drive and freewheeling clutch . 25
Addendum to the Operating Instructions – Direction of Rotation Reversal
3
Important Information
1
1
Important Information
INFORMATION
This addendum describes amendments to the "Industrial Gear Units, Helical and
Bevel Gear Units" operating instructions.
This document does not replace the detailed operating instructions.
4
Addendum to the Operating Instructions – Direction of Rotation Reversal
Structure and Function
Structure and function of backstops and freewheeling clutches
2
2
Structure and Function
The following sections are to illustrate the structure and the function of backstops and
freewheeling clutches.
2.1
Structure and function of backstops and freewheeling clutches
Backstops and freewheeling clutches are used wherever you want or must provide for
only one direction of rotation.
They are usually installed between a shaft and a housing. The shaft can only be rotated
in the determined direction. The backstop prevents the shaft from rotating in the reverse
direction.
A backstop is referred to as a freewheeling (or overrunning) clutch if it is installed between 2 shafts using an additional connecting coupling. Thus, torque transmission between the two shafts is only possible in one direction.
Backstops and freewheeling clutches consist of three main elements. The inner ring [1]
connects the backstop and the shaft. A cage guides and positions the sprags [2] between the inner and the outer ring. The outer ring [3] connects the backstop and the
housing or the connecting coupling.
[3]
[1]
[2]
[2]
[4]
[5]
[3]
[6]
[7]
[1]
1695967627
[1]
[2]
[3]
[4]
Inner ring
Sprags
Outer ring
Spring force (spring torque)
[5] Wedge
[6] Blocking direction
[7] Free-wheeling direction
The blocking effect results from the sprags [2] wedging between the inner and the outer
ring. The sprags [2] are designed to only block in one direction. A spring force [4] provides for enough contact pressure to initialize the wedging effect in the event of operation in blocking direction [6].
Addendum to the Operating Instructions – Direction of Rotation Reversal
5
Structure and Function
Drives with external backstops
2
The sprags [2] are designed to lift off from the races due to the centrifugal force as of a
certain speed level in the free-wheeling direction.. Above this lift-off speed, the backstop
is wear-free. Operating the backstop below the lift-off speed over longer periods may result in wear and the service life is reduced. Usually the backstop is lubricated with gear
unit oil in order to reduce friction and wear.
You can switch the free-wheeling direction and the blocking direction of the backstop by
turning the inner ring and the cage with the sprags by 180°.
2.2
Drives with external backstops
Drives with external backstops have the backstop installed outside of the gear unit housing [1].
The inner ring [3] of the backstop is located on a pinion shaft going out of the gear unit.
The shaft [4] and the inner ring [3] are connected via a keyed connection. The outer ring
[5] of the backstop is connected to the bearing cover [2] together with a closing cover [2].
[1]
[2]
[5]
[3]
[4]
[6]
1544412299
[1] Gear unit housing
[2] Bearing cover
[3] Inner ring
6
[4] Shaft
[5] Outer ring
[6] Closing cover
Addendum to the Operating Instructions – Direction of Rotation Reversal
Structure and Function
Drives with internal backstops
2.3
2
Drives with internal backstops
Drives with external backstops have the backstop installed inside of the gear unit housing.
The inner ring [1] of the backstop is located on an extension of the pinion shaft [2] directly
after the pinion shaft bearing. The shaft [2] and the inner ring [1] are connected via a
keyed connection. The outer ring [3] of the backstop is pressed in the housing bore.
[3]
[2]
[1]
1696282507
[1] Inner ring
[2] Shaft
[3] Outer ring
Addendum to the Operating Instructions – Direction of Rotation Reversal
7
Structure and Function
Drives with backstop, auxiliary drive and freewheeling clutch
2
2.4
Drives with backstop, auxiliary drive and freewheeling clutch
Usually, for drives with backstop and auxiliary drive, you use an external or internal
backstop [1] in conjunction with a freewheeling clutch. The backstop and the freewheeling clutch are usually on the same pinion shaft on both sides of the drive.
The backstop [1] prevents the shaft from rotating against the operating direction. The
freewheeling clutch [2] disengages the the auxiliary drive [3] during operation via the
main drive, thus preventing the auxiliary drive [3] from rotating. During operation via the
auxiliary drive [3], the freewheeling clutch [2] blocks, thus driving the pinion shaft of the
gear unit.
The directions of rotation of the backstop [1] and the freewheeling clutch [2] must be adjusted to each other, otherwise the entire system may not function properly.
[3]
[2]
[1]
1542996747
[1] Backstop
[2] Freewheeling clutch
[3] Auxiliary drive
8
Addendum to the Operating Instructions – Direction of Rotation Reversal
Position of the Backstops
X.F..
3
Position of the Backstops
3.1
X.F..
3
Fig. A
External backstop
Fig. B
Internal backstop
1543025803
Addendum to the Operating Instructions – Direction of Rotation Reversal
9
Position of the Backstops
X.F..
3
X2F..
itot
Fig.
itot
Fig.
itot
Fig.
6.3 - 20
A
X3F.100
20 - 90
A
X4F.120
100 - 355
A
X2F.110
8 - 22.4
A
X3F.110
25 - 112
A
X4F.130
125 - 450
A
X2F.120
6.3 - 18
A
20 - 25
A
X4F.140
100 - 355
A
X2F.130
8 - 22.4
A
X2F.140
6.3 - 18
A
X2F.150
8 - 22.4
A
X2F.160
6.3 - 18
A
X2F.170
8 - 22.4
A
X2F.180
6.3 - 18
A
X2F.190
7.1 - 20
A
X2F.200
6.3 - 18
A
X2F.210
7.1 - 20
A
X2F.220
6.3 - 18
A
X2F.230
7.1 - 20
A
X2F.240
6.3 - 18
A
X2F.250
7.1 - 20
A
X2F.260
6.3 -18
A
X2F.270
7.1 - 20
A
X2F.280
8 - 22.5
A
X2F.290
6.3 - 18
A
X2F.300
7.1 - 20
A
X2F.100
10
X2F.310
6.3 - 18
A
X2F.320
7.1 - 20
A
X3F..
X3F.120
X3F.130
X3F.140
X3F.150
X3F.160
X3F.170
X3F.180
X3F.190
X3F.200
X3F.210
X4F..
28 - 90
B
X4F.150
125 - 450
A
25 - 31.5
A
X4F.160
100 - 355
B
40 - 112
B
X4F.170
125 - 450
B
20 - 28
A
X4F.180
100 - 355
B
31.5 - 90
B
X4F.190
112 - 400
B
25- 33.5
A
X4F.200
100 - 355
B
40 - 112
B
X4F.210
112 - 400
B
20 - 28
A
X4F.220
100 - 355
B
31.5 - 90
B
X4F.230
112 - 400
B
25 - 35.5
A
X4F.240
100 - 355
B
40 - 112
B
X4F.250
100 - 400
B
20 - 35.5
A
X4F.260
100 - 355
B
40 - 90
B
X4F.270
112 - 400
B
22.4 - 40
A
X4F.280
125 - 450
B
45 - 100
B
X4F.290
100 - 355
B
20 - 35.5
A
X4F.300
112 - 400
B
40 - 90
B
X4F.310
100 - 355
B
22.4 - 40
A
X4F.320
112 - 400
B
45 - 100
B
X3F.220
20 - 90
A
X3F.230
22.4 - 100
A
X3F.240
20 - 90
A
X3F.250
22.4 - 100
A
X3F.260
20 - 90
A
X3F.270
22.4 - 100
A
X3F.280
25 - 112
A
X3F.290
20 - 90
A
X3F.300
22.5 - 100
A
X3F.310
20 - 90
A
X3F.320
22.5 - 100
A
Addendum to the Operating Instructions – Direction of Rotation Reversal
Position of the Backstops
X.K..
3.2
3
X.K..
Fig. A
External backstop
Fig. C
Internal backstop
1543132555
Addendum to the Operating Instructions – Direction of Rotation Reversal
11
Position of the Backstops
X.K..
3
X2K..
itot
Fig.
7.1 - 12.5
A
X3K.100
X2K.110
8 - 14
A
X2K.120
6.3 - 11.2
A
X2K.130
8 - 14
A
X2K.140
6.3 - 11.2
A
X2K.150
7.1 - 14
A
X2K.160
6.3 - 11.2
A
X2K.170
8 - 14
A
X2K.180
6.3 - 11.2
A
X2K.190
7.1 - 12.5
A
X2K.200
6.3 - 11.2
A
X2K.210
7.1 - 12.5
A
X2K.220
6.3 - 11.2
A
X2K.230
7.1 - 12.5
A
X2K.240
6.3 - 11.2
A
X2K.250
7.1 - 12.5
A
X2K.100
12
X3K..
itot
Fig.
itot
Fig.
14 - 80
A
X4K..
X4K.120
100 - 355
C
X3K.110
16 - 90
A
X4K.130
125 - 400
C
X3K.120
12.5 - 71
A
X4K.140
100 - 355
C
X3K.130
16 - 90
A
X4K.150
125 - 400
C
X3K.140
12.5 -71
A
X4K.160
100 - 355
C
X3K.150
16 - 90
A
X4K.170
125 - 400
C
X3K.160
12.5 - 71
A
X4K.180
80 - 355
C
X3K.170
16 - 90
A
X4K.190
90 - 400
C
X3K.180
12.5 -71
A
X4K.200
80 - 355
C
X3K.190
14 - 80
A
X4K.210
90 - 400
C
X3K.200
12.5 - 71
A
X4K.220
80 - 355
A
X3K.210
14 - 80
A
X4K.230
90 - 400
A
X3K.220
12.5 - 71
A
X4K.240
80 - 355
A
X3K.230
14 - 80
A
X4K.250
90 - 400
A
X3K.240
12.5 - 71
A
X4K.260
80 - 355
A
X3K.250
14 - 80
A
X4K.270
90 - 400
A
X3K.260
12.5 - 71
A
X4K.280
100 - 450
A
X3K.270
14 - 80
A
X4K.290
80 - 355
A
X3K.280
16 - 90
A
X4K.300
90 - 400
A
X3K.290
12.5 - 71
A
X4K.310
80 - 355
A
X3K.300
14 - 80
A
X4K.320
90 - 400
A
X3K.310
12.5 - 71
A
X3K.320
14 - 80
A
Addendum to the Operating Instructions – Direction of Rotation Reversal
Position of the Backstops
X.T..
3.3
3
X.T..
Fig. A
External backstop
Fig. B
Internal backstop
3299828747
Addendum to the Operating Instructions – Direction of Rotation Reversal
13
3
Position of the Backstops
X.T..
X3T..
itot
Fig.
14 - 80
A
X3T.100
16 - 90
A
X3T.120
12.5 - 71
A
X3T.130
16 - 90
X3T.140
12.5 - 71
X3T.150
X3T.160
X3T.170
X3T.180
X3T.190
X3T.200
X3T.210
X3T.220
X3T.230
X3T.240
X3T.250
14 - 80
X3T.100
14
X4T..
itot
Fig.
X4T.120
100 - 355
C
A
X4T.130
125 - 450
C
A
X4T.140
100 - 355
C
16 - 90
A
X4T.150
125 - 450
C
12.5 - 71
A
X4T.160
100 - 355
C
16 - 90
A
X4T.170
125 - 450
C
12.5 - 80
A
X4T.180
80 - 355
C
14 - 80
A
X4T.190
90 - 400
C
12.5 - 71
A
X4T.200
80 - 355
C
14 - 80
A
X4T.210
90 - 400
A
12.5 - 71
A
X4T.220
80 - 355
A
14 - 80
A
X4T.230
90 - 400
A
12.5 - 71
A
X4T.240
80 - 355
A
A
X4T.250
90 - 400
A
Addendum to the Operating Instructions – Direction of Rotation Reversal
Corresponding Directions of Rotation
X.F..
4
4
Corresponding Directions of Rotation
INFORMATION
The gear unit can be operated in both directions of rotation. An exception are gear
units with backstop.
The following tables show the direction of rotation dependencies between input and
output shafts. The gear units as well as the position of the backstop are schematically
shown as the solid shaft version.
4.1
X.F..
Shaft
position
End gear
position
1)
241)
14
23
13
3
4
3
4
213 *
124 *
4
3
X2F...
X3F...
X4F...
Shaft
position
End gear
position
134
1)
3
243 1)
4
1234 * 1)
3
X2F...
X3F...
X4F...
= Position of the backstop
= Alternative backstop position (depending on size and gear ratio)
*
1)
= Consult SEW-EURODRIVE when using a backstop
Note the restrictions regarding external forces on the LSS
Addendum to the Operating Instructions – Direction of Rotation Reversal
15
Corresponding Directions of Rotation
X.K...
4
4.2
X.K...
4.2.1
Standard
Shaft position
03
04
034
End gear pos.
4
3
3
1)
043
4
1)
X2K...
X3K...
X4K...
4.2.2
Direction of rotation reversal
Shaft position
End gear
position
03
3
1)
04
1)
4
X2K...
X3K...
X4K...
= Position of the backstop
= Alternative backstop position (depending on size and gear ratio)
1)
16
Note the restrictions regarding external forces on the LSS
Addendum to the Operating Instructions – Direction of Rotation Reversal
Corresponding Directions of Rotation
X.T...
4.3
X.T...
4.3.1
Standard
63
4
64
Shaft position
53
54
End gear pos.
4
3
Shaft position
End gear pos.
634
3
3
1)
643
4
4
1)
X3T...
X4T...
534 1)
3
543 1)
4
X3T...
X4T...
4.3.2
Direction of rotation reversal
Shaft position
End gear position
53
1)
3
54
1)
4
X3T...
X4T...
= Position of the backstop
= Alternative backstop position (depending on size and gear ratio)
1)
Note the restrictions regarding external forces on the LSS
Addendum to the Operating Instructions – Direction of Rotation Reversal
17
Changing the Direction of Rotation
Notes on installation
5
5
Changing the Direction of Rotation
5.1
Notes on installation
DANGER
Risk of crushing if the drive starts up unintentionally and the shafts or the driveline are
under load.
Severe or fatal injuries.
•
•
•
De-energize the motor before you start working on the unit.
Secure the motor against unintended power-up.
Before releasing shaft connections, be sure that there are no active torsional moments present.
WARNING
Danger of burns due to hot gear unit and hot gear unit oil.
Severe injuries.
•
Let the gear unit cool down before you start working on it.
NOTICE
Selecting improper lubricants may damage the gear unit.
Possible damage to property
•
After the direction of rotation has been changed, fill the gear unit with oil via the oil
fill plug up to the oil level marking. Use the same type of oil that has been used before. Mixing oils of different grades and/or manufacturers is not permitted.
INFORMATION
•
•
5.2
Fir changing the direction of rotation of drives with auxiliary drive and freewheeling
clutch, you will have to change the direction of rotation of the backstop as well as
the freewheeling clutch.
Use a surface sealing agent, e.g. Loctite® 5208, when installing the mount-on components on the gear unit housing.
Tightening torques
Observe the following tightening torques.
18
Bolt size
Tightening torque [Nm]
Strength classes 8.8
M5
6
M6
10
M8
25
M10
48
M12
84
M16
206
M20
402
M24
696
M30
1420
Addendum to the Operating Instructions – Direction of Rotation Reversal
Changing the Direction of Rotation
Drives with external backstops
5.3
5
Drives with external backstops
1. Drain the oil from the gear unit until the oil level is under the bearing bore of the backstop. Observe section "Notes on installation (page 18)".
2. Remove the retaining screws [1] of the backstop and remove the closing cover [2].
[5]
[4]
[3]
[2]
[1]
[6]
1622023819
3. Remove the outer ring [3]. To facilitate removal, slightly turn the outer ring [3] in freewheeling direction.
4. Remove the retaining ring [4] and the inner ring [5] with cage and sprags. When removing the backstop, do not apply pressure to the cage with the sprags but to the
inner ring [5] only. Use the tapped holes [6] on the inner ring [5] of the backstop.
5. Turn the inner ring [5] with the sprags 180° and reinstall it.
180°
[5]
1622187787
6. Secure the inner ring [5] on the shaft with the retaining ring [4].
7. Reinstall the outer ring [3] and the closing cover [2] using the retaining screws [1].
Slightly turn the outer ring [3] in the free-wheeling direction. This will make it easier
to slide it over the sprags. Thoroughly seal the parting line between the bearing cover
and the outer ring [3] of the backstop as well as the closing cover [2].
TIP
In order to facilitate the process, you may fixate the sprags with a rubber band or a
cable tie. This will make it easier to slide the outer ring over the sprags.
Addendum to the Operating Instructions – Direction of Rotation Reversal
19
Changing the Direction of Rotation
Drives with internal backstops
5
8. Alter the direction arrow on the gear unit housing.
9. Fill the gear unit with oil and check the oil level.
10.After assembly, check that the backstop runs smoothly.
5.4
Drives with internal backstops
1. Drain the oil from the gear unit until the oil level is under the bearing bores of the respective bearing cover. Observe section "Notes on installation (page 18)".
2. Loosen the retaining screws [1] of the backstop bearing cover [2]. Remove the bearing cover [2] and the spacer tube [3].
[6]
[4]
[3]
[2]
[1]
[5]
1620981899
3. Remove the retaining ring [4] that holds the inner ring [5] of the backstop on the shaft
[6].
4. Remove the inner ring [5] with cage and sprags from the shaft [6] using a suitable
pulling device [7]. Use the tapped holes [8] on the inner ring [5] of the backstop.
[5]
[7]
[8]
1621356043
20
Addendum to the Operating Instructions – Direction of Rotation Reversal
Changing the Direction of Rotation
Drives with internal backstops
5
5. Turn the inner ring [5] with cage and sprags by 180° and reinstall it. When installing
the backstop, do not apply pressure to the cage with the sprags but to the inner ring
[5] only.
180°
[5]
1733962635
6. When reinstalling the backstop, slightly turn it in free-wheeling direction so that the
sprags slide into the outer ring more easily.
TIP
In order to facilitate the process, you may fixate the sprags with a rubber band or a
cable tie. This will make it easier to slide the inner ring with cage and sprags into the
outer ring.
7. Secure the inner ring [5] on the shaft [6] using the the retaining ring [4].
8. Install the spacer tube [3] and the bearing cover [2] in reverse order. Thoroughly seal
the parting line between the bearing cover [2] and the gear unit housing.
9. Alter the direction arrow on the gear unit housing.
10. Fill the gear unit with oil and check the oil level.
11. After assembly, check that the backstop runs smoothly.
Addendum to the Operating Instructions – Direction of Rotation Reversal
21
Changing the Direction of Rotation
Drives with freewheeling clutch
5
5.5
Drives with freewheeling clutch
[6]
[5]
[1]
[3]
[4]
[2]
1626311947
1. Drain the oil from the auxiliary drive adapter. Observe section "Notes on installation
(page 18)".
2. Loosen the connection screws [2] between auxiliary drive [3] and auxiliary drive
adapter [1] and remove the auxiliary drive [3] with the freewheeling clutch [4].
3. Remove retaining ring [5], and inner ring [6] with cage and sprags. When removing
the backstop, do not apply pressure to the cage with the sprags but to the inner ring
[6] only. Use the tapped holes on the inner ring [6] of the backstop.
4. Turn the inner ring [6] with the sprags 180° and reinstall it.
180°
[6]
1626316555
22
Addendum to the Operating Instructions – Direction of Rotation Reversal
Changing the Direction of Rotation
Drives with freewheeling clutch
5
5. Secure the inner ring [6] on the shaft with the retaining ring [5].
6. Install the auxiliary drive [3] on the auxiliary drive adapter [1] using the retaining
screws [2]. If possible, slightly turn the auxiliary drive [3] in the free-wheeling direction. This will make it easier to slide the outer ring of the freewheeling clutch [4] over
the sprags. In order to prevent damage to the freewheeling clutch [4], make sure not
to tilt the auxiliary drive [3] during assembly. Seal the parting line between the auxiliary drive [3] and the auxiliary drive adapter [1].
7. Alter the direction arrow on the auxiliary drive [3]..
8. Fill the auxiliary drive adapter [1] with oil and check the oil level of the gear unit.
9. After assembly, check that the freewheeling clutch runs smoothly.
Addendum to the Operating Instructions – Direction of Rotation Reversal
23
I
6
Startup
Startup for drives with backstop
0
6
Startup
6.1
Startup for drives with backstop
NOTICE!
Improper startup may result in damages to the gear unit.
Potential damage to property.
•
Before startup, check that the oil level is correct. Refer to the unit's nameplate for
the lubricant volumes.
NOTICE!
Operating the motor in the blocking direction could destroy the backstop.
Potential damage to property.
•
•
Do not start up the motor in the blocking direction. Make sure that the motor power
supply is correctly attached so that the motor rotates in the required direction. Operating the motor in the blocking direction could destroy the backstop.
Observe the "Addendum to the operating instructions" when you change the blocking direction.
The direction of rotation is specified as viewed onto the output shaft (LSS):
•
Clockwise (CW)
•
Counterclockwise (CCW)
The permitted direction of rotation [1] is indicated on the housing.
[1]
[1]
CCW
CW
199930635
24
Addendum to the Operating Instructions – Direction of Rotation Reversal
Startup
Startup for drives with backstop, auxiliary drive and freewheeling clutch
I
6
0
6.2
Startup for drives with backstop, auxiliary drive and freewheeling clutch
6.2.1
Notes
•
Check the correct direction of rotation of the bevel-helical gear unit and make sure
that the auxiliary drive does not rotate in operating direction.
DANGER!
An overspeed may destroy the auxiliary drive
Severe or fatal injuries.
6.2.2
•
Consult SEW-EURODRIVE if you want to change the direction of rotation.
•
Before connecting the main and auxiliary drive, determine the rotating field of the
three-phase mains using a phase-sequence indicator. Check as to whether both
drives are connected according to the direction of rotation.
•
Make sure, that it is not possible to operate the main drive against the blocking direction of the bevel-helical gear unit. Do observe the direction arrow an the bevel-helical
gear unit.
•
Interlock the main drive and the auxiliary drive so that only one of the two motors can
be switched on.
•
Check the disconnection function of the speed control.
•
Make sure that the auxiliary drive is not overloaded. The auxiliary drive may only be
operated with the output torque rates indicated in the order documents.
•
Make sure that the rotary motion of the input shaft of the bevel-helical gear unit is not
obstructed during auxiliary drive operation (e.g. maintenance). A brake on the input
side of the main drive must be released for auxiliary drive operation.
Startup sequence
Adhere to the following startup sequence:
1. Starting up the auxiliary drive
2. Starting up the speed monitor
3. Starting up the main drive
TIP
Always adhere to the startup sequence. It is a prerequisite for a safe startup.
Addendum to the Operating Instructions – Direction of Rotation Reversal
25
I
6
Startup
Startup for drives with backstop, auxiliary drive and freewheeling clutch
0
6.2.3
Starting up the auxiliary drive
Make sure that the rotary motion of the input shaft of the bevel-helical is not obstructed
during auxiliary drive operation. A brake on the input side of the main drive must be released for auxiliary drive operation.
6.2.4
Starting up the speed monitor
Setting the functions
[3]
[4]
LED 1
[1b]
24 V =
LED 2
LED 3
[1a]
[2]
488815115
[1a]
[2]
[3]
[4]
[1b] Switching speed
Switching function
Starting lag
Hysteresis
LED 1 = lights up when relay has picked up
LED 2 = signals input pulse
LED 3 = shows correct operating voltage
26
Addendum to the Operating Instructions – Direction of Rotation Reversal
Startup
Startup for drives with backstop, auxiliary drive and freewheeling clutch
I
6
0
Function
Description
Setting
Switching speed [1a]
[1b]
allows for an exact setting of the
desired value
• Rough adjustment with step
switch (1, 10, 100)
• Fine adjustment with potentiometer (5 ... 50)
Step switch [1a] "10"
Potentiometer setting [1b] "7"
Switching speed = 10 x 7 = 70 pulses/min
Switching function [2]
Definition of the switching function:
• Overrun or underrun of the
switching speed
• Relay setting for an overrun of
underrun
Switching function IV
Starting lag [3]
Possibility to bypass the signal
evaluation during the start (irrelevant for switching function IV)
set to the lowers value (= 0.5 s)
Hysteresis [4]
Difference between the switch-on
and switch-off point of the relay.
set to the lowest value (= 5%)
Overview of possible switching functions:
Relay position
Switching function
[2]
when speed is
overrun
I
II
underrun
for normal operation and
start bypass
14
13
12
14
13
12
14
13
12
14
13
12
III
14
13
12
14
13
12
IV
14
13
12
14
13
12
TIP
Integrate the speed monitor into the system circuitry so that the power supply to main
drive and auxiliary drive is interrupted if the preset switching speed is overrun.
Addendum to the Operating Instructions – Direction of Rotation Reversal
27
I
6
Startup
Startup for drives with backstop, auxiliary drive and freewheeling clutch
0
Operational check
of the speed monitor
24 V =
[1a]
508095755
1. Switch on the auxiliary drive of the bucket elevator drive.
2. Set the step switch for setting the switching speed [1a] from "10" to "1" for a short
time (the switching frequency is reduced from 70 to 7 pulses/min).
3. The speed monitor recognizes a speed overrun, the output relay picks up → the operational check is successful if the power supply to the main drive and the auxiliary
drive is interrupted.
4. After a successful operational check, set the step switch for setting the switching
speed [1a] back to "10"(the switching frequency is increased from 7 to 70 pulses/
min).
6.2.5
Starting up the main drive
Before starting up the main drive, determine the rotating field of the three-phase mains
using a phase-sequence indicator. Make sure, that it is not possible to operate the main
drive against the blocking direction of the bevel-helical gear unit. Observe the direction
arrow on the bevel-helical gear unit.
28
Addendum to the Operating Instructions – Direction of Rotation Reversal
SEW-EURODRIVE—Driving the world
SEW-EURODRIVE
Driving the world
SEW-EURODRIVE GmbH & Co KG
P.O. Box 3023
D-76642 Bruchsal/Germany
Phone +49 7251 75-0
Fax +49 7251 75-1970
sew@sew-eurodrive.com
www.sew-eurodrive.com